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Boumar I, Deliorman M, Sukumar P, Qasaimeh MA. Spike- and nucleocapsid-based gold colloid assay toward the development of an adhesive bandage for rapid SARS-CoV-2 immune response detection and screening. Microsyst Nanoeng 2023; 9:82. [PMID: 37351273 PMCID: PMC10281977 DOI: 10.1038/s41378-023-00554-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 05/02/2023] [Accepted: 05/14/2023] [Indexed: 06/24/2023]
Abstract
Immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies are important biomarkers used for the diagnosis and screening of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections in both symptomatic and asymptomatic individuals. These antibodies are highly specific to the spike (S) and nucleocapsid (N) proteins of the SARS-CoV-2 virus. This paper outlines the development steps of a novel hybrid (vertical-lateral-vertical) flow assay in the form of a finger-stick point-of-care device, similar to an adhesive bandage, designed for the timely detection and screening of IgM and IgG immune responses to SARS-CoV-2 infections. The assay, comprising a vertically stacked plasma/serum separation membrane, conjugate pad, and detection (readout) zone, utilizes gold nanoparticles (AuNPs) conjugated with SARS-CoV-2 S and N proteins to effectively capture IgM and IgG antibodies from a pinprick (~15 µL) of blood in just one step and provides results of no immune IgM-/IgG-, early immune IgM+/IgG-, active immune IgM+/IgG+ or immune IgM-/IgG+ in a short amount of time (minutes). The adhesive bandage-like construction is an example of the design of rapid, low-cost, disposable, and easy-to-use tests for large-scale detection and screening in households. Furthermore, the bandage can be easily adjusted and optimized to detect different viral infections as they arise by simply selecting appropriate antigens related to pandemics and outbreaks.
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Affiliation(s)
- Imen Boumar
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
| | | | - Pavithra Sukumar
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
| | - Mohammad A. Qasaimeh
- Division of Engineering, New York University Abu Dhabi (NYUAD), Abu Dhabi, UAE
- NYU Tandon School of Engineering, New York University, New York, USA
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Yuan M, Zhang J, He Y, Yi G, Rong L, Zheng L, Zhan T, Zhou C. Circ_0062558 promotes growth, migration, and glutamine metabolism in triple-negative breast cancer by targeting the miR-876-3p/SLC1A5 axis. Arch Gynecol Obstet 2022; 306:1643-1655. [PMID: 35284960 DOI: 10.1007/s00404-022-06481-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 02/18/2022] [Indexed: 12/17/2022]
Abstract
BACKGROUND Circular RNAs (circRNAs) have been reported to function as vital regulators in cancers, including triple-negative breast cancer (TNBC). This study aimed to explore the role of circ_0062558 in TNBC. METHODS The real-time quantitative polymerase chain reaction (RT-qPCR) was conducted to quantify the expressions of circ_0062558, microRNA-876-3p (miR-876-3p), and solute carrier family 1 (neutral amino acid transporter), member 5 (SLC1A5) in TNBC tissues and cells. 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyl-2H-tetrazol-3-ium bromide (MTT), thymidine analog 5-ethynyl-2'-deoxyuridine (EdU), flow cytometry, wound healing, and Transwell assays were employed for cell phenotype analyses. Protein expression was tested by western blot analysis. Dual-luciferase reporter was used to confirm the association among circ_0062558, miR-876-3p, and SLC1A5 in TNBC. Xenograft experiments were performed to elucidate the function of circ_0062558 in vivo. RESULTS TNBC tissues and cells showed the higher level of circ_0062558 when compared with control samples. Downregulation of circ_0062558 inhibited proliferation, migration, invasion, and glutamine metabolism, while enhanced apoptosis of TNBC cells, and silencing of circ_0062558 also inhibited the growth of tumor in vivo. MiR-876-3p was confirmed as a target of circ_0062558, and circ_0062558 knockdown repressed TNBC cell malignant behaviors by increasing miR-876-3p. Furthermore, miR-876-3p inhibited malignant behaviors of TNBC cells by down-regulating SLC1A5, a newly identified target of miR-876-3p. CONCLUSION Circ_0062558 promoted TNBC progression by enhancing proliferation, survival, migration, invasion, and glutamine metabolism via miR-876-3p/SLC1A5 axis, which was helpful for understanding the carcinogenic roles of circ_0062558.
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Affiliation(s)
- Mengzhen Yuan
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Jun Zhang
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Yuxin He
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Guangming Yi
- The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, Sichuan, China
| | - Liwen Rong
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Liangjian Zheng
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Tingting Zhan
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China
| | - Congming Zhou
- Department of Oncology, The Third People's Hospital of Chengdu, No.82, Qinglong Street, Qingyang District, Chengdu, 610031, Sichuan, China.
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